/* -*-c++-*- */
/* osgGIS - GIS Library for OpenSceneGraph
 * Copyright 2007-2008 Glenn Waldron and Pelican Ventures, Inc.
 * http://osggis.org
 *
 * osgGIS is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

#ifndef _OSGGIS_FEATURE_LAYER_COMPILER_H_
#define _OSGGIS_FEATURE_LAYER_COMPILER_H_ 1

#include <osgGIS/Common>
#include <osgGIS/FeatureLayer>
#include <osgGIS/FilterGraph>
#include <osgGIS/Task>

namespace osgGIS
{
    /**
     * Compiles a feature layer into a node graph.
     */
    class OSGGIS_EXPORT FeatureLayerCompiler : public Task
    {
    public:
        FeatureLayerCompiler( 
            const std::string& name,
            FeatureLayer*      layer,
            FilterGraph*       graph, 
            FilterEnv*         env );

        FeatureLayerCompiler( 
            FeatureLayer*    layer,
            FilterGraph*     graph,
            FilterEnv*       env );

        FilterGraphResult& getResult();

        osg::Node* getResultNode();

        FilterEnv* getFilterEnv() const;

        FeatureLayer* getFeatureLayer() const;

    public: // Task interface

        virtual void run();

    protected:
        osg::ref_ptr<FeatureLayer> layer;
        osg::ref_ptr<FilterGraph>  filter_graph;
        osg::ref_ptr<FilterEnv>    env;

        FilterGraphResult          result;
        osg::ref_ptr<osg::Node>    result_node;

        
    };
}

#endif // _OSGGIS_FEATURE_LAYER_COMPILER_H_
